31368538 has 8 divisors (see below), whose sum is σ = 47697588. Its totient is φ = 15469344.

The previous prime is 31368509. The next prime is 31368551. The reversal of 31368538 is 83586313.

It can be written as a sum of positive squares in 2 ways, for example, as 27071209 + 4297329 = 5203^2 + 2073^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 31368497 and 31368506.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107281 + ... + 107572.

Almost surely, 2^31368538 is an apocalyptic number.

31368538 is a deficient number, since it is larger than the sum of its proper divisors (16329050).

31368538 is a wasteful number, since it uses less digits than its factorization.

31368538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214928.

The product of its digits is 51840, while the sum is 37.

The square root of 31368538 is about 5600.7622695487. The cubic root of 31368538 is about 315.3780226905.

The spelling of 31368538 in words is "thirty-one million, three hundred sixty-eight thousand, five hundred thirty-eight".